Kimi to Boku no Saigo no Senjou⸴ Arui wa Sekai ga Hajimaru Seisen (Our Last Crusade or the Rise of a New World)

Kimi to Boku no Saigo no Senjou, Aruiwa Sekai ga Hajimaru Seisen (キミと僕の最後の戦場、あるいは世界が始まる聖戦), also known as Our Last Crusade or the Rise of a New World is an anime series based on the light novel of the same name written by Kei Sazane and illustrated by Ao Nekonabe.